Police were searching for David Glenn Hobson, 33, of Alfred, who escaped Thursday from the Carroll County House of Corrections in Ossipee, N.H., where he was awaiting trial on a burglary charge. Hobson escaped by climbing over the jail’s razor-wire fence, officials said.

Police believe Hobson has a gun and is out to harm at least two people he knows in southern Maine, said Maine State Police spokesman Stephen McCausland. Those people have been notified and are believed to be in a safe location, he said, declining to specify their relationship with Hobson.

Police say an SUV that was stolen from Wakefield, N.H., was found overnight Saturday near the Sanford-Alfred-Lyman town lines. Hobson may still be in the area, probably in nearby woods.

Investigators found a considerable amount of blood in the vehicle, confirming that Hobson was seriously injured.

State, federal, county and local officers searched several areas in Alfred and Sanford on Saturday and early Sunday morning with no sightings of Hobson.

Maine State Police were joined in the search by New Hampshire State Police, the Maine Warden Service, the U.S. Marshals Service and local law enforcement agencies, McCausland said.

Hobson, who has a long criminal record, is described as white, 5-foot-6 inches tall and weighing 135 pounds. He was last seen wearing a gray sweatshirt and sweatpants. His police mug shot shows him with a shaved head.

Hobson’s 55-year-old father, Glenn Hobson, was charged Friday night with hindering apprehension and refusing to submit to arrest. Troopers say they found medical supplies, food, water, clothing and blankets the elder Hobson left outside near his Alfred home for his son.

Authorities had initially believed Hobson might have been driving a stolen blue Honda Accord. But police said Sunday night that the Accord had been recovered and wasn’t related to Hobson’s escape.